Trouble implementing back end functionality to UI

I've coded the UI and have it set up as attached at the bottom of the post, and I was wondering how I'd go about implementing my prewritten back end code to the UI. I don't know how storing form information would work and how variables work. Any pointers to where to go next?

I have basic knowledge of signals and slots but I'm not sure where to go with it.

@SGaist
Thanks for the welcome!
I actually currently only have this page built as a series of widgets in a QTabWidget. I feel like if I were to progress forward, it'd probably need to be reimplemented into a QWizard right?

To save the values before going to next page,
you can simply take them via the UI ?
(pseudo code)
QString name = ui->nameWidget->text()
QDateTime date= ui->TimeDateWidget->?
int Height = ui->heightWidget->Text().toInt();
....

Also if this really is a Wizard Design, then using QWizard as @SGaist
suggest - might save u time.

( QStackedWidget also very good for pages)

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